P: A → BP: ?C: B–some–C

DennisGerrard May 29, 2017

Some Relation

Not understand this one

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Mehran June 1, 2017

@DennisGerrard these drills have explanations that you can see when reviewing them.

Hope that helps! Please let us know if you have any other questions.

thomas19 December 3, 2019

how can the contrapositive of the answer be correct, when it's only being reversed and not negated?